AEG ÖKO FAVORIT 5470 Operating Instructions Manual page 15

The dishwasher is factory set "level 4" as this suits most users.
If you use phosphate free detergents containing enzymes, add salt starting
from 4°dH (7° TH).
To set a different level, proceed as follows:
The level setting is possible only with the dishwasher turned off.
Press and keep pressed the "NORMAL BIO 50°" programme pushbutton.
Press the on/off pushbutton.
Keep pressed the "NORMAL BIO 50°" programme pushbutton for
approximately 5 seconds until the pilot light of the "NORMAL BIO 50°"
programme starts to flash indicating the setting of level "2" (factory setting).
Press the programme pushbutton corresponding to the required level, (see
chart).
After 5 seconds the pilot light will turn off and the dishwasher will memorise
the new level setting.
If your water is level "0" it is already soft and therefore there is no need to
use salt. In this case do not take into account the salt light on the control
panel, which illuminates when there is no salt inside the salt container.
Salt MUST be used regularly from level "1" upward if you use the new
compact detergent containing enzymes.
SO222
15